This is a straight popularity poll, so you can vote YES for all 30 books to be in the Top 20, though there's not much point in doing that. If you don't think a much-loved book should be in the Top 20, because it's not geeky enough, just grit your teeth and vote NO.

Sorry, the free version of the site only allows for 100 participants, but I think it's probably enough. Please don't try to vote more than once.